First thing - your arms doing a minimal (if non-existent) amount of work in the drill. A good, full-range arm swing will improve not only lower body power, but also improve overall posture. Hands must rise up in front of your face and pull downwards to counter balance lower body power.
Your A-skip has the knee coming up a little higher than I would like, leading to your extension leg buckling at the knee slightly (leading to your hips dropping slightly). You can also see the foot creep out in front, as mentioned by others in this thread. Pause the video at the point of highest knee lift and you will see the postural issues.
I always emphasize vertical action of legs and arms (up and down, not forward and back) in these drills to keep delivery of power efficient.
As N2 said, if knee passes the point of maximum distance from the body, the hips drop. In your As there is too much oscillation, focus on the up and down. As for your Bs, in general it is a drill I find pretty complicated, you start with a A and then you extend the knee in front of you, with leg height determined by your power and flexibility.
Limbs move through an arc. If the hip is the axis of rotation, the knee joint will reach a point furthest from the body roughly at a height slightly below the hip. If you lift the knee too high, it will rotate back into your body (and, consequently, your supporting knee will bend and your hips will drop).
your toe is up and thats good
try not bringing your knee so high ( knee does not pass the height of your hip) and the rest should take care of itself immediately or over time. ( its possible your hip flexors and or your quads are tight ( both?) and or you need treatment/ hot and colds etc)
I would get rid of the B skips entirely. and replace them with a drill you know you are doing well or dont worry about it.
If it helps I can tell you that Charlie thought my b skips often sucked so he was indifferent to having me do them.
looking forward to seeing the next clip
could do epsom salts, massage instead of contrast
I am not sure what or who you have access to get the job done for therapy but the reason I am a big fan of hot and colds is its efficient and extremely effective when done correctly.
I just finished contrast showering, it has been a while… I will stick to it, as the feeling afterward is worth the struggle! :o
I also got an EMS since last spring, and take great advantage of the active recovery program, mainly on hams and calves.